Lukas Czerner 332391a993 fs: Fix page cache inconsistency when mixing buffered and AIO DIO ... Currently when mixing buffered reads and asynchronous direct writes it is possible to end up with the situation where we have stale data in the page cache while the new data is already written to disk. This is permanent until the affected pages are flushed away. Despite the fact that mixing buffered and direct IO is ill-advised it does pose a thread for a data integrity, is unexpected and should be fixed. Fix this by deferring completion of asynchronous direct writes to a process context in the case that there are mapped pages to be found in the inode. Later before the completion in dio_complete() invalidate the pages in question. This ensures that after the completion the pages in the written area are either unmapped, or populated with up-to-date data. Also do the same for the iomap case which uses iomap_dio_complete() instead. This has a side effect of deferring the completion to a process context for every AIO DIO that happens on inode that has pages mapped. However since the consensus is that this is ill-advised practice the performance implication should not be a problem. This was based on proposal from Jeff Moyer, thanks! Reviewed-by: Jan Kara <jack@suse.cz> Reviewed-by: Darrick J. Wong <darrick.wong@oracle.com> Reviewed-by: Jeff Moyer <jmoyer@redhat.com> Signed-off-by: Lukas Czerner <lczerner@redhat.com> Signed-off-by: Jens Axboe <axboe@kernel.dk>		2017-09-25 08:56:05 -06:00
..
kasan	Merge branch 'linus' into locking/core, to pick up fixes	2017-08-10 12:20:53 +02:00
backing-dev.c	mm/backing-dev.c: fix an error handling path in 'cgwb_create()'	2017-09-11 14:16:44 -06:00
balloon_compaction.c	mm/migrate: new migrate mode MIGRATE_SYNC_NO_COPY	2017-09-08 18:26:46 -07:00
bootmem.c
cleancache.c
cma_debug.c	mm/cma_debug.c: fix stack corruption due to sprintf usage	2017-08-18 15:32:02 -07:00
cma.c
cma.h
compaction.c
debug_page_ref.c
debug.c	mm: make tlb_flush_pending global	2017-08-10 15:54:07 -07:00
dmapool.c
early_ioremap.c	x86/mm: Add support to access boot related data in the clear	2017-07-18 11:38:02 +02:00
fadvise.c	mm: fadvise: avoid fadvise for fs without backing device	2017-09-08 18:26:47 -07:00
failslab.c
filemap.c	fs: Fix page cache inconsistency when mixing buffered and AIO DIO	2017-09-25 08:56:05 -06:00
frame_vector.c
frontswap.c
gup.c	mm/device-public-memory: device memory cache coherent with CPU	2017-09-08 18:26:46 -07:00
highmem.c
hmm.c	mm/hmm: avoid bloating arch that do not make use of HMM	2017-09-08 18:26:46 -07:00
huge_memory.c	mm: soft-dirty: keep soft-dirty bits over thp migration	2017-09-08 18:26:45 -07:00
hugetlb_cgroup.c
hugetlb.c	powerpc updates for 4.14	2017-09-07 10:15:40 -07:00
hwpoison-inject.c
init-mm.c
internal.h	mm, oom: do not rely on TIF_MEMDIE for memory reserves access	2017-09-06 17:27:30 -07:00
interval_tree.c	lib/interval_tree: fast overlap detection	2017-09-08 18:26:49 -07:00
Kconfig	mm/hmm: avoid bloating arch that do not make use of HMM	2017-09-08 18:26:46 -07:00
Kconfig.debug
khugepaged.c
kmemcheck.c
kmemleak-test.c
kmemleak.c
ksm.c	mm/ksm.c: constify attribute_group structures	2017-09-06 17:27:27 -07:00
list_lru.c
maccess.c
madvise.c	mm/device-public-memory: device memory cache coherent with CPU	2017-09-08 18:26:46 -07:00
Makefile	mm/hmm: avoid bloating arch that do not make use of HMM	2017-09-08 18:26:46 -07:00
memblock.c	mm/memblock.c: reversed logic in memblock_discard()	2017-08-25 16:12:46 -07:00
memcontrol.c	mem/memcg: cache rightmost node	2017-09-08 18:26:49 -07:00
memory_hotplug.c	mm/ZONE_DEVICE: new type of ZONE_DEVICE for unaddressable memory	2017-09-08 18:26:46 -07:00
memory-failure.c	x86/mm, mm/hwpoison: Clear PRESENT bit for kernel 1:1 mappings of poison pages	2017-08-17 10:30:49 +02:00
memory.c	lib/interval_tree: fast overlap detection	2017-09-08 18:26:49 -07:00
mempolicy.c	mm/mempolicy.c: remove BUG_ON() checks for VMA inside mpol_misplaced()	2017-09-08 18:26:47 -07:00
mempool.c
memtest.c
migrate.c	mm/hmm: avoid bloating arch that do not make use of HMM	2017-09-08 18:26:46 -07:00
mincore.c
mlock.c	mm/mlock.c: use page_zone() instead of page_zone_id()	2017-09-08 18:26:47 -07:00
mm_init.c
mmap.c	lib/interval_tree: fast overlap detection	2017-09-08 18:26:49 -07:00
mmu_context.c
mmu_notifier.c	mm/mmu_notifier: kill invalidate_page	2017-08-31 16:13:00 -07:00
mmzone.c
mprotect.c	mm/ZONE_DEVICE: new type of ZONE_DEVICE for unaddressable memory	2017-09-08 18:26:46 -07:00
mremap.c	mm: thp: check pmd migration entry in common path	2017-09-08 18:26:45 -07:00
msync.c
nobootmem.c	mm: discard memblock data later	2017-08-18 15:32:01 -07:00
nommu.c	Merge branch 'work.set_fs' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs	2017-09-14 18:13:32 -07:00
oom_kill.c	mm: oom: let oom_reap_task and exit_mmap run concurrently	2017-09-06 17:27:30 -07:00
page_alloc.c	mm/page_alloc.c: apply gfp_allowed_mask before the first allocation attempt	2017-09-08 18:26:47 -07:00
page_counter.c
page_ext.c	mm, page_ext: periodically reschedule during page_ext_init()	2017-09-06 17:27:26 -07:00
page_idle.c	mm/page_idle.c: constify attribute_group structures	2017-09-06 17:27:27 -07:00
page_io.c	Merge branch 'for-4.14/block' of git://git.kernel.dk/linux-block	2017-09-07 11:59:42 -07:00
page_isolation.c
page_owner.c	mm, page_owner: skip unnecessary stack_trace entries	2017-09-13 18:53:16 -07:00
page_poison.c
page_vma_mapped.c	mm/migrate: support un-addressable ZONE_DEVICE page in migration	2017-09-08 18:26:46 -07:00
page-writeback.c	mm: rename global_page_state to global_zone_page_state	2017-09-06 17:27:29 -07:00
pagewalk.c
percpu-internal.h	percpu: skip chunks if the alloc does not fit in the contig hint	2017-07-26 17:41:05 -04:00
percpu-km.c	percpu: replace area map allocator with bitmap	2017-07-26 17:41:05 -04:00
percpu-stats.c	percpu: add first_bit to keep track of the first free in the bitmap	2017-07-26 17:41:05 -04:00
percpu-vm.c
percpu.c	percpu: update header to contain bitmap allocator explanation.	2017-07-26 17:41:06 -04:00
pgtable-generic.c	mm: thp: enable thp migration in generic path	2017-09-08 18:26:45 -07:00
process_vm_access.c
quicklist.c
readahead.c
rmap.c	lib/interval_tree: fast overlap detection	2017-09-08 18:26:49 -07:00
rodata_test.c
shmem.c	mm: treewide: remove GFP_TEMPORARY allocation flag	2017-09-13 18:53:16 -07:00
slab_common.c
slab.c
slab.h	locking/lockdep: Rework FS_RECLAIM annotation	2017-08-10 12:29:03 +02:00
slob.c	locking/lockdep: Rework FS_RECLAIM annotation	2017-08-10 12:29:03 +02:00
slub.c	mm: treewide: remove GFP_TEMPORARY allocation flag	2017-09-13 18:53:16 -07:00
sparse-vmemmap.c	mm, sparse, page_ext: drop ugly N_HIGH_MEMORY branches for allocations	2017-09-06 17:27:26 -07:00
sparse.c	mm/sparse.c: fix typo in online_mem_sections	2017-09-08 18:26:47 -07:00
swap_cgroup.c
swap_slots.c
swap_state.c	mm, swap: add sysfs interface for VMA based swap readahead	2017-09-06 17:27:29 -07:00
swap.c	mm/device-public-memory: device memory cache coherent with CPU	2017-09-08 18:26:46 -07:00
swapfile.c	mm/swapfile.c: fix swapon frontswap_map memory leak on error	2017-09-08 18:26:47 -07:00
truncate.c
usercopy.c
userfaultfd.c	userfaultfd: shmem: wire up shmem_mfill_zeropage_pte	2017-09-06 17:27:28 -07:00
util.c	mm: rename global_page_state to global_zone_page_state	2017-09-06 17:27:29 -07:00
vmacache.c
vmalloc.c	mm/vmalloc.c: don't reinvent the wheel but use existing llist API	2017-09-06 17:27:29 -07:00
vmpressure.c
vmscan.c	mm, THP, swap: add THP swapping out fallback counting	2017-09-06 17:27:28 -07:00
vmstat.c	mm: consider the number in local CPUs when reading NUMA stats	2017-09-08 18:26:47 -07:00
workingset.c
z3fold.c	z3fold: use per-cpu unbuddied lists	2017-09-06 17:27:30 -07:00
zbud.c
zpool.c
zsmalloc.c	mm/zsmalloc.c: change stat type parameter to int	2017-09-08 18:26:47 -07:00
zswap.c